I actually installed the processor a few weeks ago finally replacing my aging celeron and I had hyperthreading right away in XP and my stripped down XP and Ubuntu. It's not until I used nlite to create a bare bones XP that is so stripped down it'll do nothing more than play games and run a web browser (really really fast I should add) that I lost hyper threading in that install only. After some more reading I've decided it's no real loss for playing games but I next want to make an ISO for my main install of windows with SP3 and drivers and license key. In that one I do run "normal" apps that will take advantage of HT so I need to nail down what I messed up to loose it. Thanks for the suggestions and I will try HAL in the device manager but I would like to get it sorted all OOBE